异步调用,加信号量控制并发数的demo代码

import asyncio
async def my_coroutine(task_id, semaphore):   
	async with semaphore:  # 这里会等待信号量的许可    
	print(f"Task {task_id} started")   
	await asyncio.sleep(1)  # 模拟耗时操作  
	print(f"Task {task_id} finished")     
	return f"Result of task {task_id}"
async def main():   
	max_concurrency = 3  # 设置最大的并发数为3   
	semaphore = asyncio.Semaphore(max_concurrency)   
	tasks = [my_coroutine(i, semaphore) for i in range(10)]   
	results = await asyncio.gather(*tasks)   
	print("All tasks completed:", results)
# 运行主协程
asyncio.run(main())